<VV> Dropped Valve Seats

[Mark Durham]

George, yes, on heat cycle, however, even that was a normal cycle and
the seat should have stayed in. The hole was probably a bit oversize
and it needed a oversize seat in the first place. Mark durham

Sent from my Windows Phone
From: George Jones
Sent: 5/8/2012 18:14
To: Smitty
Cc: virtualvairs at corvair.org
Subject: Re: <VV> Dropped Valve Seats
And lets not forget about the '68 110 that, in May of 1988, after a
"warm-over" rebuild and daily operation for about 3 months, dropped a valve
seat when driven for about 150 miles; stopped for lunch (a half an hour)
and then started the car again to a loud repeated hammering sound. Everyone
said "110's don't drop valve seats". I believe I would toss that into the
heat cycle category.

George Jones
--------------------------------
Corvair Society of America (CORSA)  (since 1987)
Performance Corvair Group
Central Florida Corvair Club (Since 2009)
Tidewater Corvair Club (since 1987)
Central Virginia Corvair Club (since 2006)
'65 Monza Crown V8 Convertible
'66 Monza Coupe Custom
'67 Monza Coupe Custom



On Tue, May 8, 2012 at 11:49 AM, Smitty <vairologist at cox.net> wrote:

> Smitty says;  For what it is worth I'd like to make a comment on valve
> seats.  There may have been some that dropped valve seats after getting an
> engine hot on the uphill and then cooling going down the other side.  I
> know
> of no incidents like that, first hand.  The ones I know of happened like
> this.  1- Owner of a 140 on a warm day convertible cruise in town stopped
> for an ice cream.  Came out and started the engine, and a seat fell out.
>  2-
> Car in restoration for 2 years, initially started and allowed to idle for
> 20
> minutes to quiet lifters.  68 95 hp.  Shortly after lifters pumped up, seat
> fell out.  3-Restoration project engine being used to move car in and out
> of
> garage. 64 95 hp.  During one of maybe 10 such moves, seat fell out.
>  4-Hard
> working, camper hauling, Late 95 hp in flat country left idling to warm up
> engine on a cold morning.  After 5 minutes, seat fell out.  5-Late 110hp,
> (also a camper hauller in flat country), left idling to charge camper
> battery.  15 minutes later a seat fell out.  6-The jury is still out on
> this
> one because the seat went back in the hole and the owner refuses to believe
> there is anything wrong.  I40 hp. Car was in a parade.  Seat fell out as
> parade was over.
>
> Three of those were mine.  I realize that I am only one person and am
> limited to my knowledge of events in my 43 years of playing with Corvairs,
> but those experiences indicate to me that most valve seats fall out at low
> rpm and in non stressful conditions.  Not going down the back side of the
> mountain.
>
> If I have to drive a car which has to be handled with kid gloves under
> certain conditions, I don't think I will be driving it long.
>
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